A. A. A. Al-zubaidy, M. J. Mohammed, and I. A. Najim, “Dysregulation of Serum Serotonin–Melatonin Biosynthetic Pathway Markers in Patients with Obsessive-Compulsive Disorder: A Case-Control Study”, Int J Body Mind Cult, vol. 13, no. 3, pp. 56–62, Mar. 2026.